16271298509 has 2 divisors, whose sum is σ = 16271298510. Its totient is φ = 16271298508.

The previous prime is 16271298473. The next prime is 16271298517. The reversal of 16271298509 is 90589217261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15764058025 + 507240484 = 125555^2 + 22522^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16271298509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16231298509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8135649254 + 8135649255.

It is an arithmetic number, because the mean of its divisors is an integer number (8135649255).

Almost surely, 2^16271298509 is an apocalyptic number.

It is an amenable number.

16271298509 is a deficient number, since it is larger than the sum of its proper divisors (1).

16271298509 is an equidigital number, since it uses as much as digits as its factorization.

16271298509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 50.

The spelling of 16271298509 in words is "sixteen billion, two hundred seventy-one million, two hundred ninety-eight thousand, five hundred nine".